Question

MENU DRIVEN/ SWITCH CASE PROGRAMS
9. Write a menu driven program to calculate:
(a) Area of circle= p*r2, where p = 22/7
(b) Area of square=side*side
(c) Area of a rectngle=length*breadth
Enter 'c' to calculate area of circle, 's' to calculate area of square and 'r' to calculate area of rectangle.

Answer 1

Answer:

import java.util.Scanner; public class

KboatMenuArea { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("Enter c to calculate area of circle"); System.out.println("Enter s to calculate area of square"); System.out.println("Enter r to calculate area of rectangle"); System.out.print("Enter your choice: "); char choice = in.next().charAt(0); switch(choice) { case 'c': System.out.print("Enter radius of circle: "); double r = in.nextDouble(); double ca = (22 / 7.0) * r * r; System.out.println("Area of circle = " + ca); break; case 's': System.out.print("Enter side of square: "); double side = in.nextDouble(); double sa = side * side; System.out.println("Area of square = " + sa); break; case 'r': System.out.print("Enter length of rectangle: "); double l = in.nextDouble(); System.out.print("Enter breadth of rectangle: "); double b = in.nextDouble(); double ra = l * b; System.out.println("Area of rectangle = " + ra); break; default: System.out.println("Wrong choice!"); } } }